CN111021623A - Bidirectional prestressed steel structure straw wallboard or floor system - Google Patents
Bidirectional prestressed steel structure straw wallboard or floor system Download PDFInfo
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- CN111021623A CN111021623A CN201911364573.1A CN201911364573A CN111021623A CN 111021623 A CN111021623 A CN 111021623A CN 201911364573 A CN201911364573 A CN 201911364573A CN 111021623 A CN111021623 A CN 111021623A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/02—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements
- E04B1/14—Structures consisting primarily of load-supporting, block-shaped, or slab-shaped elements the elements being composed of two or more materials
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
Abstract
The invention discloses a bidirectional prestressed steel structure straw wallboard or floor system, and belongs to the technical field of steel structure building house building components. After the multilayer straw building components are sequentially overlapped up and down, the prestressed transverse tie bars are added through vertical penetration, so that the straw building components on each layer are connected in series by the prestressed transverse tie bars, and the multilayer straw building components are extruded together to form the wallboard after the transverse prestress is added to each prestressed transverse tie bar. The invention makes full use of the strong pressure resistance of the straw sawdust compacted body, combines the tensile property and the fixing effect of the C-shaped steel with symmetrical two sides, and combines the pressure resistance of the straw sawdust compacted body with the tensile property of the C-shaped steel with symmetrical two sides after applying moderate prestress to the prestress longitudinal tie bar, so that the building member has enough traction prestress, thereby being capable of obviously improving the supporting performance of the building member.
Description
Technical Field
The invention belongs to the technical field of steel structure building and house building components, and particularly relates to a bidirectional prestressed steel structure straw wallboard or floor system.
Background
The cold-formed thin-wall steel structure building system is characterized by light dead weight, good earthquake resistance, various connection forms, suitability for complex building modeling, less or no wet operation, suitability for factory optimization design and modular production, short construction period, flexible layout of house patterns, less construction waste, reusable components, near zero environmental pollution and the like, is more and more concerned by people and is listed as a preferred project in bottom-layer and medium-high-rise buildings. At present, the development and application of novel high-strength cold-bending section steel, especially thin-wall cold-bending section steel, have been popularized to a certain extent. However, the deep processing of the product components in the cold-bending thin-wall steel structure is insufficient in China, and the extensive part production and modular production are not achieved. The method is used to adopt a foreign forming technology, and the developed structure system with independent intellectual property rights is few and few, and is lack of independent brands. With the rapid development of new rural construction in recent years, the house demand of novel structures is continuously increased, the traditional concept is gradually changed, steel structure houses are gradually developed in rural areas, the existing steel structure house system structure is heavy, the construction period is long, the cost is high, and the popularization and the application are not facilitated. Especially, in recent years, after the environmental protection standard of engineering environment is improved, a lot of traditional steel structure building components combined with concrete are gradually reduced, after the traditional steel structure building components are built as frameworks, the components are generally poured with concrete, and spaces among the frameworks are filled in a building block or concrete filling mode to form wall bodies or floor support plates, and the filling materials have the advantages of self weight, low heat insulation performance, requirement of on-site pouring construction, setting time, low efficiency and poor construction environment and need to be improved. The construction speed and the construction efficiency are high due to the influence of environmental protection factors, and the construction method also becomes one of new construction requirements.
The inventor Weiqu et al proposed a "steel-wood type steel straw structural system" in 2016, 12, 30, and the patent application with publication No. CN106759905A is aimed at solving the problem of quick installation of the above patent, in which the structural form is formed by wrapping channel-shaped steel and straw compression core body, fixing by rivets and connecting by connecting holes. However, according to the practical process of the inventor, the combined building element of the channel-shaped steel and the straw-wrapped compressed core body adopted in the patent document still has the problem of insufficient bearing strength when used as a beam or a column, and particularly, when the combined building element cannot be directly applied to a large-span beam element system, the upright column design needs to be added according to the accepted strength of the combined building element, or the auxiliary element design needs to be added, so that in practical application, the patent document is not applied to a large-scale composite structure system, and the application range and the popularization value are greatly limited.
The straw sawdust compact is a well-known mature product, is prepared by adding an adhesive, a hydrophobic agent, a flame retardant, a preservative and the like in the preparation process and pressing the mixture by large-ton-level pressure, has good integrity, moisture resistance, flame retardance, holding force, heat preservation and corrosion resistance, is compared with the existing concrete structure only in terms of compression resistance, and has the advantages of equivalent compression strength to the existing concrete structure, but in the aspect of practical application, the straw sawdust compact has lower tensile property and poor shear resistance, and is not suitable for large-span members. Although the above patent document adopts the channel-shaped steel and the wrapped straw compression core (similar to the straw wood chip compact), the strength of the whole building member can be improved to a certain extent by means of the tensile property of the channel-shaped steel, the channel-shaped steel and the straw compression core described in the patent document are not tightly combined and transmitted to the common resistance along the whole rod member and are coordinated with deformation, that is, other direct combination constraint relationship is not existed between the channel-shaped steel and the straw compression core except for the combination by the rivet. Therefore, when the building member is used for the upright post, the building member cannot bear external load with enough strength, and tests prove that after the pressure is increased, the groove-shaped steel can expand towards two sides, so that the wrapping constraint on the straw compression core body is lost, the stress concentration part in the middle of the straw compression core body is locally cracked, and the whole upright post is collapsed due to the fact that the external load is continuously increased. Meanwhile, when the building component is used as a beam system, the small span is not obviously uncomfortable, but the large span (more than 3 meters) is added with solid load to cause the integral bending phenomenon, and the further increase of the load can cause the bending of the local stress concentration area of the groove-shaped steel, thereby causing the local fracture of the straw compression core body. In the early development of the above patent literature technology, the complexity of the edge of the channel-shaped steel is increased, for example, a special-shaped structure is additionally arranged on the edge of the channel-shaped steel and is fixed by a middle cross bracing plate, but the method only depends on increasing the special-shaped edge of the channel-shaped steel to improve the strength of the whole building component, and practice proves that the scheme cannot be completely practical. Therefore, the inventor further improves the technology on the basis of the technical scheme so as to effectively combine the cold-bending thin-wall steel structure and the straw wood chip compacted body to be applied to a building system.
Disclosure of Invention
Aiming at the problems that the traditional building member depending on the combination of the steel structure and the concrete has low on-site pouring construction efficiency and poor construction environment and often does not meet the requirement of environmental protection standard, and aiming at the problem that the application range is limited due to the strength difference in the existing process of combining the cold-formed thin-walled steel structure with the straw compression core, the invention provides a bidirectional prestressed steel structure straw wallboard or floor system, which makes full use of the strong compression resistance of the straw wood chip compact, combines the tensile resistance and the fixing effect of C-shaped steel which is symmetrical on two sides, after the prestress longitudinal tie bar is applied with proper prestress, the compression resistance of the straw wood chip compacted body is combined with the tensile property of the C-shaped steel with symmetrical two sides, so that the building member has enough traction prestress, therefore, the supporting performance of the building member can be obviously improved, and the shearing strength of the building member is obviously improved compared with that of the existing filling type large-span steel-structured beam.
The technical scheme adopted by the invention for solving the technical problems is as follows: a bidirectional prestressed construction straw wallboard or floor system is characterized in that after multiple layers of straw construction members are sequentially stacked up and down, prestressed transverse tie bars are added through vertical penetration, so that the straw construction members of all layers are connected in series by the prestressed transverse tie bars, and the multilayer straw construction members are extruded together to form a wallboard after transverse prestressing is added to the prestressed transverse tie bars; at least the uppermost layer and the lowermost layer of the straw building components comprise buckled C-shaped steel I and C-shaped steel II and straw wood chip compacted bodies matched and sleeved on the inner sides of the buckled C-shaped steel I and the buckled C-shaped steel II, columnar inner cavities are formed by the buckled C-shaped steel I and the buckled C-shaped steel II, the columnar straw wood chip compacted bodies are matched and sleeved in the inner cavities, the edges of two sides of the C-shaped steel I and the C-shaped steel II and the straw wood chip compacted bodies are fixed together through section steel rivets to form a combined body, and end transverse nodes are sleeved at two ends of the combined body, or outer end plates are sleeved at two; the method comprises the following steps that longitudinal through holes are formed in a straw sawdust compacted body along the length direction, transverse through holes are formed in the width direction, prestressed longitudinal tie bars penetrate through the longitudinal through holes of the straw sawdust compacted body and then penetrate through corresponding end plate through holes in end transverse nodes or outer end plates respectively, two ends of the prestressed longitudinal tie bars are fixed through prestressed locking nuts respectively, and each prestressed locking nut is adjusted to enable each prestressed longitudinal tie bar to have prestress; the prestressed transverse lacing wires penetrate through transverse through holes of the straw wood chip compacted body and then respectively penetrate through corresponding profile steel through holes on the two sides of the C-shaped steel and the C-shaped steel of each layer of straw building components, two ends of each prestressed transverse lacing wire are respectively fixed through the prestressed locking nuts, and each prestressed locking nut is adjusted to enable each prestressed transverse lacing wire to have prestress.
Furthermore, shaped steel through holes are formed in two side edges of each layer of straw building component, after short-distance prestressed transverse tie bars are vertically added along each layer of straw building component, two ends of each short-distance prestressed transverse tie bar are fixed through prestressed locking nuts respectively, and each prestressed locking nut is adjusted to enable each short-distance prestressed transverse tie bar to have prestressed tension.
The end transverse node comprises a contact square sleeve and an outer end plate, wherein the outer end plate is fixed on the outer side of the connection square sleeve, the contact square sleeve is sleeved on the inner sides of two ends of the first C-shaped steel and the second C-shaped steel, the outer end plate is located on the outer sides of the two ends of the first C-shaped steel and the second C-shaped steel, the outer end plate is in butt joint with the end faces of the first C-shaped steel and the second C-shaped steel, and an end plate through hole is formed in the outer end plate and used for penetrating. Further, the end transverse node comprises a contact square sleeve, an inner base plate and an outer end plate, wherein the inner base plate is fixed on the inner side of the contact square sleeve, the outer end plate is fixed on the outer side of the connection square sleeve, and end plate through holes corresponding in position are respectively formed in the inner base plate and the outer end plate and used for penetrating and installing the prestress longitudinal tie bars.
Furthermore, sleeve plate connecting holes and node rivet holes are uniformly distributed in the side walls of the connecting square sleeves, and the section steel rivet holes arranged in the side walls of the C-section steel I and the C-section steel II correspond to the node rivet holes in the connecting square sleeves and are fixed together through node rivets; and the two opposite side walls of the connecting square sleeve are provided with corresponding sleeve plate connecting holes for penetrating through and installing the node fixing bolts, and are fixed through the node locking nuts and used for connecting the transverse members. Or simultaneously applying prestress to the node fixing bolt by adjusting the node locking nut.
Furthermore, two side edges or four side walls of the outer end plate are provided with node flange plates, the node flange plates are provided with end plate through holes, and the node flange plates are fixedly connected with vertical components through node fixing bolts and node locking nuts. Or simultaneously applying prestress to the node fixing bolt by adjusting the node locking nut.
In addition, when prestress is applied to each tie bar, one mode adopted is that one end of a tie bar hole for sleeving a prestress longitudinal tie bar or a prestress transverse tie bar is arranged in a straw sawdust compacting body, an end nut groove with the diameter larger than that of the tie bar hole is arranged and matched and sleeved with a connecting nut, the connecting nut is sleeved with a tie bar thread section at the tail end of the prestress longitudinal tie bar or the prestress transverse tie bar, a prestress tie bar is connected to the rear side of the connecting nut in a threaded manner, the prestress tie bar is also sleeved in an end plate through hole of an outer end plate, and the cap end of the prestress tie bar is positioned outside the end plate through hole.
The invention has the beneficial effects that: the invention fully utilizes the strong pressure resistance of the straw sawdust compacted body, combines the tensile property and the fixing effect of the C-shaped steel with symmetrical two sides, and combines the pressure resistance of the straw sawdust compacted body with the tensile property of the C-shaped steel with symmetrical two sides after applying moderate prestress to the prestress longitudinal tie bar, so that the building member has enough traction prestress, thereby obviously improving the supporting property of the building member, and particularly when the building member is applied to a beam system, compared with the existing filled wallboard or floor slab, the invention has very high tensile and bending resistance bearing property and good heat insulation performance, and the system becomes the most preferable mode of a passive house.
The invention also adds a prestressed transverse lacing wire on the straw wallboard system, which is used for transversely compressing the C-shaped steel and the straw wood chip compact body which are symmetrical at two sides and providing prestress for resisting longitudinal prestress along the longitudinal direction, so that the longitudinal prestress and the transverse prestress are combined to improve the strength of the building member.
The straw wallboard system not only can be independently used as a wallboard system, but also can be used for a floor bearing plate system, the longitudinal prestress lacing wires at the end parts can penetrate through the corresponding vertical connecting building components from the end parts, the transverse prestress lacing wires at the middle parts can improve the self strength and the transverse prestress of each building component, the adjacent building components can be connected into a whole, the transverse prestress is applied at the same time, and the prestress connection relationship of each building component is realized by combining the longitudinal prestress and the transverse prestress.
The invention is a preferred form of passive housing. Besides the compact straw brick, the straw brick can also be used for mixing straw particles with adhesive, gypsum powder, cement powder and geopolymer and filling.
Drawings
Figure 1 is one of the schematic perspective views of the wallboard system of the present invention.
Fig. 2 is a second schematic perspective view of the wall panel system of the present invention.
Fig. 3 is a schematic front view of the structure of fig. 1.
Fig. 4 is an enlarged schematic view of a portion a of fig. 3.
Fig. 5 is one of the enlarged structural diagrams of the part B in fig. 3.
Fig. 6 is a second enlarged schematic view of the part B in fig. 3.
Fig. 7 is an enlarged cross-sectional view of the portion C in fig. 3.
In the drawing, reference numeral 2a is a beam straw building component, 201 is a first C-shaped steel, 202 is a second C-shaped steel, 203 is a straw wood chip compact, 206 is a section steel through hole, 207 is a node fixing hole, 208 is a section steel rivet hole, 3a is an end transverse node, 303 is an outer end plate, 304 is an end plate through hole, 4 is a prestressed longitudinal tie bar, 401 is a tie bar threaded section, 402 is a tie bar hole, 403 is an end nut groove, 5 is a prestressed transverse tie bar, 801 is a connecting nut, 802 is a prestressed tie bolt, 803 is a fixing cap, and 804 is a prestressed lock nut.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example 1: the utility model provides a two-way prestressing force steel construction straw wallboard or floor system, as shown in figure 1, figure 2 and figure 3, figure 1 is entity wallboard system, and figure 2 is the whole wallboard system that contains door and window, and this wallboard system is overlapped from top to bottom in proper order by multilayer straw building element, through running through in the vertical back that increases prestressing force horizontal lacing wire, makes each layer straw building element concatenate by prestressing force horizontal lacing wire. And the positions of the prestressed bolts and the connecting structural members are determined by the prestress tensioning and the corresponding end locking members according to the BIM structure diagram.
Wherein, each layer of straw building component is as shown in fig. 7, the straw building component at the uppermost end and the lowermost end is a columnar inner cavity formed by buckling a first C-shaped steel 201 and a second C-shaped steel 202, and a columnar straw wood chip compact 203 is matched and sleeved in the square column or the hexagonal column-shaped inner cavity. The embodiment of the invention adopts the straw and wood chip compacted body, which means the straw compacted body or the wood chip compacted body or the mixed compacted body of the straw and the wood chip, and has lower heat conductivity coefficient. The thermal conductivity coefficient refers to the heat quantity transferred by 1 square meter area in 1 hour through 1 square meter of material with the temperature difference of 1 degree (K, DEG C) on the two side surfaces under the condition of stable heat transfer, and is related to the building energy consumption, indoor environment and many other heat and humidity processes, the thermal conductivity coefficient is related to the factors of the composition structure, density, water content and temperature of the material, the material with low thermal conductivity coefficient is usually defined as the heat preservation material, for example, the thermal conductivity coefficient of the common clay brick is 0.7-0.8W/(m.K), the transverse thermal conductivity coefficient of the wood is 0.14W/(m.K), the longitudinal thermal conductivity coefficient of the wood is 0.38W/(m.K), the thermal conductivity of the steel is 36-54W/(m.K), the air heat conductivity coefficient is 0.023 w/(m.K), the heat conductivity coefficient of the straw is smaller than that of wood, and the heat conductivity coefficient of the straw sawdust compacted body is slightly larger than that of the wood and obviously smaller than that of a common clay brick through tests, so that the straw sawdust compacted body is a good heat-insulating material and is a material for passive housing.
As shown in figure 1, two side edges of the C-shaped steel 201 and the C-shaped steel 202 which are positioned at two sides of the straw compacted body are not butted, a fit clearance exists, and meanwhile, two side edges of the C-shaped steel 201 and the C-shaped steel 202 are fixed with the straw sawdust compacted body 203 through the shaped steel rivets to form a combined body. As shown in fig. 7, end transverse nodes 3a are also fitted to both ends of the assembly. The straw sawdust compact 203 is provided with longitudinal through holes along the length direction and transverse through holes along the width direction. Meanwhile, the prestressed longitudinal tie bars 4 penetrate through the longitudinal through holes of the straw wood chip compacted body 203 along the length direction, the tail ends of the prestressed longitudinal tie bars 4 respectively penetrate through the corresponding end plate through holes 304 on the end transverse nodes 3a, two ends of the prestressed longitudinal tie bars 4 are respectively fixed through the prestressed locking nuts 8, and each prestressed locking nut 8 is adjusted to enable each prestressed longitudinal tie bar 4 to have prestress.
In this embodiment, the prestressed longitudinal tie bars 4 respectively added to each layer of straw building components can provide a pre-stressing force, so that each layer of straw building components has an enough pre-stressing force along the length direction, and forms a repulsive force with the C-shaped steel and the straw chip pressing bodies 203 on both sides, that is, a reaction force is formed between the tension of the prestressed longitudinal tie bars 4 and the C-shaped steel and the straw chip pressing bodies 203 on both sides. In fact, the pulling force of the prestressed longitudinal tie bar 4 mainly acts on the straw wood chip compacted body 203 through the end transverse joints 3a at the two ends and then acts on the C-shaped steel. Therefore, the load-bearing performance of the building element is not completely dependent on the tensile strength of the C-shaped steel, but depends on the tensile strength of the combined stress, but from the aspect of the tensile strength of the building element, the prestressed longitudinal tie bars 4 can provide strong tensile performance because the prestressed tensile force is applied in advance, and the deformation of the building element and the straw wood chip compacted body 203 inside the building element can be eliminated by the longitudinal prestress before deformation.
On the basis, after the transverse prestress is added to each prestress transverse lacing wire, the multilayer straw building components are extruded together to form the wallboard. The prestressed transverse lacing wires penetrate through transverse through holes of the straw sawdust compacted bodies on each layer and penetrate through corresponding profile steel through holes on the first side face and the second side face of the C-shaped steel of the straw building component on each layer respectively, two ends of each prestressed transverse lacing wire are fixed through prestressed locking nuts respectively, and each prestressed locking nut is adjusted to enable each prestressed transverse lacing wire to have prestress. Through addding horizontal lacing wire 5 of prestressing force and can not making every layer of straw building element both sides C shaped steel and the straw saw-dust compact 203 at middle part pass through pressure connection together, can ensure moreover that straw saw-dust compact 203 self has prestressing force along transversely for the vertical lacing wire 4 of countermeasures prestressing force can overcome straw saw-dust compact 203 through horizontal prestressing force promptly and open, thereby prevent that straw saw-dust compact 203 from warping (this deformation probably is eliminated by horizontal prestressing force before warping). Thus, the shear resistance can be improved.
On the other hand, due to the prestress pressing and wrapping effect of the C-shaped steel on the two sides on the straw sawdust compacted body 203, the straw sawdust compacted body 203 can guarantee an even stress state, and the problem that the whole building component is collapsed due to damage caused by local stress concentration finally does not occur. Thus, the shear resistance can be improved. The transverse prestress tension on the C-shaped steel on both sides of the building element can be changed in distribution according to load distribution, for example, the transverse prestress tension is usually added in the middle of the building element to improve the shearing resistance of the middle of the building element.
As shown in fig. 7, the end transverse node 3a includes a contact square sleeve and an outer end plate 303, wherein the outer end plate 303 is fixed outside the connection square sleeve, the contact square sleeve is sleeved inside two ends of the first C-shaped steel 201 and the second C-shaped steel 202, the outer end plate 303 is located outside two ends of the first C-shaped steel 201 and the second C-shaped steel 202, the outer end plate 303 is butted with end faces of the first C-shaped steel 201 and the second C-shaped steel 202, and an end plate through hole 304 is provided on the outer end plate 303 for installing the longitudinal prestressed tendon 4 therethrough. And furthermore, sleeve plate connecting holes and node rivet holes are uniformly distributed in the side wall of the connecting square sleeve, and the section steel rivet holes 208 formed in the side walls of the first C-section steel 201 and the second C-section steel 202 correspond to the node rivet holes in the connecting square sleeve and are fixed together through node rivets. And the two opposite side walls of the connecting square sleeve are provided with corresponding sleeve plate connecting holes for penetrating through and installing the node fixing bolts, and are fixed through the node locking nuts and used for connecting the transverse members. The node fixing bolt can be prestressed by adjusting the node locking nut.
Example 2: on the basis of embodiment 1, shaped steel through holes are further formed in two side edges of each layer of straw building component, after short-distance prestressed transverse tie bars are vertically added along each layer of straw building component, two ends of each short-distance prestressed transverse tie bar are respectively fixed through prestressed locking nuts, and each prestressed locking nut is adjusted to enable each short-distance prestressed transverse tie bar to have prestress tension.
Example 3: on the basis of embodiment 1, as shown in fig. 7, node flange plates are further disposed on two side edges or four side walls of the outer end plate 303, the node flange plates are provided with end plate through holes 304, and the node flange plates are fixed by node fixing bolts and node locking nuts for connecting vertical members.
Example 4: on the basis of embodiment 1, as shown in fig. 7, further, the end transverse node 3a includes a contact square sleeve, an inner pad plate and an outer end plate 303, wherein the inner pad plate is fixed inside the contact square sleeve, the contact square sleeve is sleeved inside two ends of the first C-shaped steel 201 and the second C-shaped steel 202, the outer end plate 303 is located outside two ends of the first C-shaped steel 201 and the second C-shaped steel 202, the outer end plate 303 is butted with end faces of the first C-shaped steel 201 and the second C-shaped steel 202, and end plate through holes 304 corresponding in position are respectively arranged on the inner pad plate and the outer end plate 303 for penetrating and installing the prestress longitudinal tie bar 4.
Example 5: on the basis of embodiment 4, as shown in fig. 7, further, sleeve plate connecting holes and node rivet holes are uniformly distributed on the side walls of the connecting square sleeves, and the section steel rivet holes 208 formed in the side walls of the first C-section steel 201 and the second C-section steel 202 correspond to the node rivet holes in the connecting square sleeves and are fixed together through node rivets; and the two opposite side walls of the connecting square sleeve are provided with corresponding sleeve plate connecting holes for penetrating through and installing the node fixing bolts, and are fixed through the node locking nuts and used for connecting the transverse members. The node fixing bolt can be prestressed by adjusting the node locking nut.
Example 6: on the basis of embodiment 1, the outer end plates 303 are sleeved at both ends of the combined body, the longitudinal prestressed tendons 4 penetrate through the longitudinal through holes of the straw wood chip compacting body 203 along the length direction, the tail ends of the longitudinal prestressed tendons 4 penetrate through the corresponding end plate through holes 304 on the outer end plates 303, both ends of the longitudinal prestressed tendons 4 are fixed through the prestressed locking nuts 8, and the prestressed locking nuts 8 are adjusted to enable the longitudinal prestressed tendons 4 to have prestress.
Example 7: on the basis of embodiment 1, an extended prestressed tensioning structure is adopted, as shown in fig. 4 to 6, specifically, one end of a tendon hole for sleeving a prestressed longitudinal tendon or a prestressed transverse tendon in a straw sawdust compacting body is provided with an end nut groove with a diameter larger than that of the tendon hole and is sleeved with a connecting nut in a matching manner, the connecting nut is sleeved with a tendon threaded section at the tail end of the prestressed longitudinal tendon or the prestressed transverse tendon, a prestressed pull bolt is connected to the rear side of the connecting nut in a threaded manner, the prestressed pull bolt is also sleeved in an end plate through hole of an outer end plate, and the cap end of the prestressed pull bolt is located outside the end plate through hole.
In this embodiment, after the longitudinal prestressed tendon 4 or the transverse prestressed tendon 5 is matched to pass through the tendon hole of the straw wood chip compacting body 203, one end of the longitudinal prestressed tendon 4 or the transverse prestressed tendon 5 is fixedly connected through the fixing cap 803 or the prestressed locking nut 804, and the other end is connected through the connecting nut 801 located in the end nut groove 403, and at this time, no prestress is applied. And then the prestress is applied by further rotating the prestress tie bolt 802 through the fixed connection of the prestress tie bolt 802 and the connecting nut 801, at this time, the prestress tie bolt 802 pulls the connecting nut 801 to further pull the prestress longitudinal tie bar 4 or the prestress transverse tie bar 5, and prestress is generated.
In this embodiment, by providing the extension type prestressed tensioning structure, not only the steel straw wall panel or the floor system can be independently prestressed, but also a prestress is generated between any abutting members such as the wall panel or the floor system and the beam or the column, that is, the prestressed tie bolt 802 is extended out of any abutting members, so as to realize a prestressed connection relationship between any abutting members such as the wall panel or the floor system and the beam or the column.
Embodiment 8, on the basis of the above embodiments, the edge of the C-shaped steel may further include a straight flange, and the straight flange is embedded into the corresponding caulking groove on the side surface of the straw wood chip compacting body. The straw wood chip compacted body can also be used for mixing straw particles with adhesives, gypsum powder, cement powder and geopolymer and filling materials.
Claims (9)
1. A bidirectional prestressed steel structure straw wallboard or floor slab system is characterized in that after multiple layers of straw building components are sequentially stacked up and down, prestressed transverse tie bars are added through vertical penetration, so that the straw building components on each layer are connected in series by the prestressed transverse tie bars, and the multiple layers of straw building components are extruded together to form the wallboard after transverse prestress is added to the prestressed transverse tie bars; each layer of straw building component or at least the uppermost layer and the lowermost layer of component comprises a C-shaped steel I and a C-shaped steel II which are buckled with each other and straw wood chip compacted bodies of which the inner sides are matched and sleeved with each other, two side edges of the C-shaped steel I and the C-shaped steel II are fixed with the straw wood chip compacted bodies through section steel rivets to form a combined body, two ends of the combined body are sleeved with end transverse nodes, or two ends of the gold-coated silver combined body are sleeved with outer end plates; the method comprises the following steps that longitudinal through holes are formed in a straw sawdust compacted body along the length direction, transverse through holes are formed in the width direction, prestressed longitudinal tie bars penetrate through the longitudinal through holes of the straw sawdust compacted body and then penetrate through corresponding end plate through holes in end transverse nodes or outer end plates respectively, two ends of the prestressed longitudinal tie bars are fixed through prestressed locking nuts respectively, and each prestressed locking nut is adjusted to enable each prestressed longitudinal tie bar to have prestress; the prestressed transverse lacing wires penetrate through transverse through holes of the straw wood chip compacted body and then respectively penetrate through corresponding profile steel through holes on the two sides of the C-shaped steel and the C-shaped steel of each layer of straw building components, two ends of each prestressed transverse lacing wire are respectively fixed through the prestressed locking nuts, and each prestressed locking nut is adjusted to enable each prestressed transverse lacing wire to have prestress.
2. The bidirectional prestressed steel structure straw wallboard or floor system of claim 1, wherein profile steel perforations are provided on both side edges of each layer of straw building member, after a short-distance prestressed transverse tie bar is added vertically along each layer of straw building member, both ends of the short-distance prestressed transverse tie bar are respectively fixed by a prestressed locking nut, and each prestressed locking nut is adjusted to enable each short-distance prestressed transverse tie bar to have a prestressed tension.
3. The prestressed steel structure straw wallboard or floor system as claimed in claim 1, wherein the end transverse node comprises a square connecting sleeve and an outer end plate, wherein the outer end plate is fixed outside the square connecting sleeve, the square connecting sleeve is sleeved inside two ends of the first C-shaped steel and the second C-shaped steel, the outer end plate is located outside two ends of the first C-shaped steel and the second C-shaped steel, the outer end plate is in butt joint with end faces of the first C-shaped steel and the second C-shaped steel, and an end plate through hole is formed in the outer end plate and used for penetrating and installing the prestressed longitudinal tie bar.
4. The prestressed steel structure straw wallboard or floor system of claim 1, wherein the end transverse node comprises a contact square sleeve, an inner backing plate and an outer end plate, wherein the inner backing plate is fixed on the inner side of the contact square sleeve, the outer end plate is fixed on the outer side of the connection square sleeve, and end plate through holes corresponding in position are respectively arranged on the inner backing plate and the outer end plate and used for installing the prestressed longitudinal tie bars in a penetrating manner.
5. The bidirectional prestressed steel structure straw wallboard or floor system as claimed in claim 3 or 4, wherein sleeve plate connecting holes and node rivet holes are uniformly distributed on the side wall of the connecting square sleeve, and the section steel rivet holes arranged on the side walls of the first C-section steel and the second C-section steel correspond to the node rivet holes on the connecting square sleeve and are fixed together through node rivets; and the two opposite side walls of the connecting square sleeve are provided with corresponding sleeve plate connecting holes for penetrating through and installing the node fixing bolts, and are fixed through the node locking nuts and used for connecting the transverse members.
6. The prestressed steel structure straw wallboard or floor system in two directions of claim 3 or 4, wherein node flange plates are arranged on two sides or four side walls of the outer end plate, the node flange plates are provided with end plate through holes, and the node flange plates are fixedly connected with vertical components through node fixing bolts and node locking nuts.
7. The bi-directional prestressed steel structural straw wallboard or floor system of claim 5, wherein the node fixing bolts are prestressed by adjusting node locking nuts.
8. The bi-directional prestressed steel structural straw wallboard or floor system of claim 6, wherein the node fixing bolts are prestressed by adjusting node locking nuts.
9. The prestressed steel structure straw wallboard or floor system of claim 1, wherein a tendon hole end for sleeving the prestressed longitudinal tendon or the prestressed transverse tendon is arranged in the straw sawdust compacting body, an end nut groove with a diameter larger than that of the tendon hole is arranged and matched with and sleeved with a connecting nut, the connecting nut is sleeved with a tendon threaded section at the tail end of the prestressed longitudinal tendon or the prestressed transverse tendon, a prestressed pull bolt is connected to the rear side of the connecting nut in a threaded manner, the prestressed pull bolt is also sleeved in an end plate through hole of the outer end plate at the same time, and the cap end of the prestressed pull bolt is positioned outside the end plate through hole.
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| CN201911364573.1A CN111021623A (en) | 2019-12-26 | 2019-12-26 | Bidirectional prestressed steel structure straw wallboard or floor system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113463759A (en) * | 2021-08-16 | 2021-10-01 | 任建利 | Arch structure frame, multi-curved-cavity wall, power generation building and colorful power generation city |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113463759A (en) * | 2021-08-16 | 2021-10-01 | 任建利 | Arch structure frame, multi-curved-cavity wall, power generation building and colorful power generation city |
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